5261 libm should stop using synonyms.h

*** 25,35 ****
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak scalbnf = __scalbnf
  
  #include "libm.h"
  #include <float.h>              /* FLT_MAX, FLT_MIN */
  #include <stdlib.h>             /* abs */
  
--- 25,35 ----
  /*
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
! #pragma weak __scalbnf = scalbnf
  
  #include "libm.h"
  #include <float.h>              /* FLT_MAX, FLT_MIN */
  #include <stdlib.h>             /* abs */